pain, tension, and weakness upon walking that subsides during periods of rest

pale skin

paleness or cold feeling in fingertips, toes, hands, and feet

personality changes

pounding in the ears

puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue

redness of skin

redness, pain, swelling or irritation of eye, eyelid, or inner lining of eyelid

seeing double

seeing, hearing, or feeling things that are not there

seizures

severe numbness, especially on one side of the face or body

severe or sudden headache

severe tiredness

shortness of breath or troubled breathing

skin irritation or rash, including rash that looks like psoriasis

slurred speech

sore throat

stopping of heart

sweating

swelling of face, fingers, feet, lower legs, and ankles

swollen glands

temporary blindness

tingling or pain in fingers or toes when exposed to cold

tunnel vision

unconsciousness

unusual tiredness or weakness

weakness in arm and/or leg on one side of the body, sudden and severe

weight gain

wheezing

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Less common

Acid or sour stomach

belching

body aches or pain

diarrhea

dry mouth

ear congestion

hearing loss

heartburn

indigestion

lack or loss of strength

loss of appetite

loss of voice

nightmares

runny nose

sleepiness or unusual drowsiness

sleeplessness

sneezing

stomach discomfort, upset, or pain

stuffy nose

trouble sleeping

unable to sleep

weight loss

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.